CN115057576A - Operation method for advanced treatment and reuse of petrochemical industry sewage and application thereof - Google Patents

Operation method for advanced treatment and reuse of petrochemical industry sewage and application thereof Download PDF

Info

Publication number
CN115057576A
CN115057576A CN202110935289.6A CN202110935289A CN115057576A CN 115057576 A CN115057576 A CN 115057576A CN 202110935289 A CN202110935289 A CN 202110935289A CN 115057576 A CN115057576 A CN 115057576A
Authority
CN
China
Prior art keywords
sewage
module
membrane
operation method
treatment
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202110935289.6A
Other languages
Chinese (zh)
Other versions
CN115057576B (en
Inventor
赵学法
陶伟强
张珍君
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jinan Huichengda Technology Co ltd
Original Assignee
Jinan Huichengda Technology Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jinan Huichengda Technology Co ltd filed Critical Jinan Huichengda Technology Co ltd
Priority to CN202110935289.6A priority Critical patent/CN115057576B/en
Publication of CN115057576A publication Critical patent/CN115057576A/en
Application granted granted Critical
Publication of CN115057576B publication Critical patent/CN115057576B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00—Multistage treatment of water, waste water or sewage
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/24—Treatment of water, waste water, or sewage by flotation
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
    • C02F1/469—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis
    • C02F1/4693—Treatment of water, waste water, or sewage by electrochemical methods by electrochemical separation, e.g. by electro-osmosis, electrodialysis, electrophoresis electrodialysis
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/72—Treatment of water, waste water, or sewage by oxidation
    • C02F1/78—Treatment of water, waste water, or sewage by oxidation with ozone
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
    • C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
    • C02F2103/365—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds from petrochemical industry (e.g. refineries)
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2203/00—Apparatus and plants for the biological treatment of water, waste water or sewage
    • C02F2203/006—Apparatus and plants for the biological treatment of water, waste water or sewage details of construction, e.g. specially adapted seals, modules, connections
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00—General aspects of water treatment
    • C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/30—Aerobic and anaerobic processes
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W10/00—Technologies for wastewater treatment
    • Y02W10/10—Biological treatment of water, waste water, or sewage

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Organic Chemistry (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

The invention relates to the field of oil refining sewage treatment, in particular to an operation method for advanced treatment and recycling of sewage in petrochemical industry and application thereof. The oil removal module comprises an API oil-water segmentation module and an air floatation module, the desalination module comprises an EDI desalination module and a BPM membrane desalination module, flocculating agent aluminum sulfate is added into the air floatation module, and the centralized processing module comprises a microorganism supplement system, an MBR, an MABR control system, an RO and an UF double-membrane system. The modular sewage treatment system adopts the modular treatment devices, the devices are simple and can be flexibly moved, each device can be increased or reduced according to actual needs, the modular devices can be flexibly transported to a production source to treat sewage, the modular devices can also be used as standby treatment devices to deal with the impact of abnormal conditions on enterprises when the sewage treatment devices are abnormal, and the economic burden on the enterprises is small.

Description

Operation method for advanced treatment and reuse of petrochemical industry sewage and application thereof
Technical Field
The invention relates to the field of C02F9/14, in particular to an operation method for advanced treatment and recycling of sewage in petrochemical industry and application thereof.
Background
Water environment pollution and water resource shortage are one of the environmental resource problems which are concerned about all over the world at present, and on one hand, people need to develop new water resources as much as possible to increase the water supply amount, and on the other hand, the sewage treatment needs to be enhanced, so that the pollution degree of the treated sewage to the environment is reduced, and the recycling target is achieved. The sewage recycling not only can effectively reduce the sewage discharge amount and reduce the pollution degree to the environment, but also can enable the sewage to become a valuable water source and increase the water supply, and is an important development direction of the current sewage treatment. The causes of water environment pollution are numerous, wherein industrial sewage is one of important factors of water body pollution, sewage discharged by petroleum enterprises is an important part of industrial water, and oil refining sewage is a type of sewage discharged by the petroleum and chemical enterprises in oil refining, product processing and other processes. Petrochemical refining sewage mainly comes from three aspects, sewage that the crude oil course of working produced, and the production process participates in the circulating cooling water, and the rainwater falls to ground and collects the sewage that forms. The sewage produced in the crude oil processing process has the most serious pollution degree, the most complex treatment and the greatest harm to the environment, and although the proportion of the sewage water produced in the crude oil processing process to the total amount of sewage of the whole petrochemical enterprise is not large, the pollution components are complex, the pollution is serious and the treatment is difficult. Petrochemical refinery wastewater produced in the crude oil processing process usually contains more hydrocarbons, benzene series substances, ethers, volatile powder, amines, mercaptan and other substances, the substances are difficult to biodegrade and are mostly toxic and harmful, and the discharged petroleum wastewater has great harm to aquatic organisms, soil, crop growth and human health, and is one of important industrial pollution sources.
The petrochemical oil refining sewage treatment process is generally divided into three stages from the sewage treatment degree. The primary treatment is generally used for removing suspended solids and other substances in the wastewater to ensure that the subsequent treatment is carried out smoothly, and the primary treatment usually adopts the methods of grating, precipitation, neutralization, oil removal and the like. The secondary treatment of the oil refining wastewater mainly degrades and removes organic pollutants to meet the emission standard requirements, and biological methods are commonly used for the secondary treatment, and comprise an activated sludge method, a biofilm method and various biological methods improved on the basis of the two methods. The third-stage treatment (also called advanced treatment) is mainly to perform the treatment of decoloring, deodorizing, reducing trace elements, nutrients and the like in the water on the sewage subjected to the second-stage treatment by various methods such as physics, chemistry, biology and the like, and further improve the quality of the effluent water so as to reduce the influence on the environment or use the produced water as reuse water. The method is a key point for the reuse of sewage of the original three sets of sewage treatment plants as the water supplement of circulating cooling water. The advanced treatment process makes it possible to transform the existing sewage treatment plant into a reusable sewage treatment system, greatly improves the reuse rate of sewage of petrochemical oil refining enterprises in China and inevitably generates good economic benefits.
The existing petroleum sewage treatment system generally has the problems of complex structure, high manufacturing cost and difficulty in bearing cost for small and medium-sized enterprises, and in addition, the treatment of benzene substances, ethers, volatile powder, amines, mercaptan and other substances is not thorough, residual chemical substances have great harm to soil crops, and the enterprises bear greater economic burden due to corrosion and damage to pipelines when the residual chemical substances are used as circulating water.
CN201911051803.9 discloses a method for treating petrochemical mixed discharged sewage, which adopts a multi-stage combined biological membrane denitrification mode to purify nitrogen and phosphorus in sewage, but the sewage of a petrochemical plant contains abundant impurities such as amines, salts and bacteria, and the treatment method cannot completely purify the sewage at one time.
CN201810083607.9 discloses a petrochemical sewage treatment system, purifies including multistage reverse osmosis water treatment facilities, multistage cooling crystallization device and centrifugal device, contains a large amount of heavy oil heavy salt impurity in the sewage, directly can make the jam of membrane and the stagnation of purification process by reverse osmosis membrane filtration.
Disclosure of Invention
In order to solve the above problems, a first aspect of the present invention provides an operation method for advanced treatment and reuse of petrochemical industry sewage, which is characterized in that: according to different sewage outlet positions, sewage is divided into oily sewage, sulfur-containing sewage, salt-containing sewage and other sewage, wherein the other sewage comprises factory polluted rainwater, domestic sewage and polluted condensate water.
The oily sewage enters the centralized treatment module after being treated by the oil removal module.
The oily sewage comprises but is not limited to oil tank cutting water, machine pump cooling water, laboratory sewage, stripping sewage, initial rainwater of a device area and domestic sewage.
As a preferred embodiment, the oil removal module comprises an API oil water segmentation module and a first air flotation module.
The API oil-water segmentation module is used for removing larger insoluble oil in sewage and separating the insoluble oil from the sewage.
The first air floating module is used for removing tiny suspended matters with specific gravity close to water in the sewage.
Preferably, a flocculating agent is added into the first air flotation module, and the flocculating agent is aluminum sulfate.
Preferably, the first air flotation module adopts an electrolysis method to produce bubbles, the voltage of the electrolysis method is 6-8v, and the diameter of the bubbles is 0.5-5 cm.
In the API oil-water segmentation module, large oil blocks floating on the surface are removed through a filtering mode, sewage after primary filtering enters the air flotation module, the moving speed and the size of bubbles are controlled through a direct current mode with the voltage of 6-8v in the first air flotation tank, and the applicant finds that the moving speed and the size of the bubbles generated when the voltage is 6-8v are moderate, the bubbles are uniform, the diameter size is in a range of 0.5-5cm, oil drops in the sewage can be effectively brought to the surface of the sewage, the oil drops are effectively connected into large oil drops, and flocculation is easy. When the voltage is too high, the bubbles are excessively expanded and burst, and the internal oil droplets cannot move to the surface.
The flocculating agent is added into the first air flotation module, so that oil drops brought to the liquid level by bubbles are effectively precipitated through chemical reaction, the permeable membrane and the filtering membrane in a subsequent double-membrane system can be prevented from being blocked, the membrane replacement frequency is reduced, and the continuous working time of the system is prolonged. The oil content of the sewage treated by the oil removing module can be reduced to be below 100mg/L through detection, and the oil removing effect is good.
Preferably, the oil removal module further comprises an MBR biochemical system.
Preferably, the MBR biochemical system is used for removing suspended matters, COD (chemical oxygen demand), ammonia nitrogen compounds and phosphorus compounds in sewage.
As a preferred embodiment, the centralized processing module includes a biological module and a double membrane module.
Preferably, the biological module comprises a primary biochemical module and a secondary biochemical module.
Preferably, the primary biochemical module comprises a microbial supplementation system.
The microorganism supplementing system degrades organic pollutants and inorganic pollutants in sewage through aerobic microorganisms and anaerobic microorganisms in the system.
Preferably, the microorganism in the microorganism supplementing system is denitrifying bacteria.
Preferably, the secondary biochemical module comprises an MBR and an MABR control system.
And the MBR and MABR control systems filter the active sludge in the sewage through MBR and MABR membranes.
Preferably, the MBR membrane is made of polyester, and the pore diameter of the membrane is 0.1-0.3 μm.
Preferably, the MBR middle membrane is made of polycarbonate
Preferably, the membrane in the MBR is made of fluorine-containing ethylene copolymer, and the pore diameter of the membrane is 0.05-0.2 μm.
Preferably, the membrane in the MBR is made of polytetrafluoroethylene.
Preferably, the temperature of the secondary biochemical module is 45-55 ℃.
The applicant finds that the temperature has a great influence on the reaction rate of the MBR and MABR control systems, when the reaction temperature is 45-55 ℃, the purification rate of the MBR and MABR control systems can reach more than 90%, and the purification rate is reduced when the temperature is too high or too low, which is probably because the MBR and MABR membranes are compact and thin when the temperature is 45-55 ℃, the purification effect is good, and when the temperature is too high or too low, the activity of the denitrifying bacteria enzyme is inhibited or inactivated, so that the purification efficiency is reduced.
Preferably, the dual membrane module comprises a RO, UF dual membrane system.
The RO and UF double-membrane system is used for removing dissolved salts, colloids, bacteria, viruses and bacterial endotoxins in sewage.
Preferably, the membranes in the RO have a water permeability of 8 to 14GFD (flow per surface, gallons per square foot per day).
Preferably, the molecular cut-off of the membrane in UF is 30000 and 38000 daltons.
The applicant finds that the water permeability can be improved and the permeability of metal ions can be reduced by limiting the water permeability of the membrane in RO, the retention rate of macromolecules such as protein, pigment, polysaccharide and the like can be effectively improved by limiting the molecular interception rate of the UF membrane, the permeability of micromolecule substances such as inorganic salt, ash and the like is unexpectedly improved, the clogging rate of the UF membrane is also unexpectedly reduced, and the service life is prolonged. Through the connection use of the RO and UF double-membrane system, the overall purification efficiency of the sewage treatment system is improved.
And the sulfur-containing sewage enters the centralized treatment module after being treated by the oil removal module.
The sulfur-containing sewage includes but is not limited to atmospheric and vacuum distillation sewage, catalytic cracking sewage, hydrocracking sewage, delayed coking sewage and hydrofining sewage.
In a preferred embodiment, the oil removal module comprises an API oil water staging module and a second air flotation module.
Preferably, a flocculating agent is added into the second air flotation module, and the flocculating agent is aluminum sulfate.
As a preferred embodiment, the centralized processing module includes a biological module and a double membrane module.
Preferably, the biological module comprises a primary biochemical module and a secondary biochemical module.
Preferably, the primary biochemical module comprises a microbial replenishment system.
Preferably, the secondary biochemical module comprises an MBR and an MABR control system.
Preferably, the dual membrane module comprises a RO, UF dual membrane system.
And the salt-containing sewage enters a centralized treatment module after being treated by a desalting module.
The salt-containing sewage comprises but is not limited to electric desalted water, alkali-containing sewage of a product refining device, sewage of a circulating water field, drainage of a commercial storage and a catalytic device for regenerating flue gas desulfurization waste water.
As a preferred embodiment, the desalination module comprises a third air flotation module, an AO biochemical module, an ozonolysis module, an EDI desalination module, a BPM membrane desalination module.
Preferably, the third air flotation module is used for removing micro suspended matters with specific gravity close to water in the sewage.
Preferably, a flocculating agent is added into the third air flotation module, and the flocculating agent is aluminum chloride and ferric chloride in a mass ratio of (1-5): 1, compounding.
Preferably, the third air flotation module is a dissolved air flotation module, and air is sent by an air compressor to produce bubbles.
Preferably, the AO biochemical module is used for decomposing organic pollutants in the sewage and assisting in nitrogen and phosphorus removal.
Preferably, the AO biochemical module comprises a grid well, an adjusting tank lifting water pump, a sedimentation tank, an anoxic tank, a biological contact oxidation tank, a disinfection tank and a sludge tank.
Preferably, the ozonolysis module is used for degrading organic pollutants which are difficult to biodegrade and toxic.
Preferably, the EDI desalination module is prepared from a strong base anion exchange resin of 201X7MB and a strong acid cation exchange resin of 001X7MB, and is purchased from Tianjin Kaishu resin technology Co.
EDI is the continuous electric desalination technology, fuses electrodialysis technique and ion exchange technique as an organic whole, installs anion and cation exchange resin in the fresh water room of electrodialysis technique additional, through anion and cation exchange resin to the selective permeation effect of anion and cation, realizes the directional migration of aquatic ion under the effect of electric field to reach the degree of depth purification desalination of water, and carries out continuous regeneration to filling resin through the hydrogen ion and the hydroxyl ion that the water electrolysis produced.
The invention solves the problem that the desalination rate of the traditional electrodialysis is only 45-60% by combining the electrodialysis technology and the ion exchange technology, and the desalination rate of the sewage of the EDI desalination module is 75-90% by detection.
The BPM membrane desalination module is used to split water into hydrogen and hydroxide ions, converting the salts in aqueous solution into the corresponding acids and bases.
Preferably, the BPM film thickness is 150-.
Preferably, the desalination module further comprises a BAF biochemical system.
Preferably, the BAF biochemical system is used for removing suspended matter, COD (chemical oxygen demand), ammonia nitrogen compounds, phosphorus compounds in sewage.
As a preferred embodiment, the centralized processing module includes a biological module and a double membrane module.
Preferably, the biological module comprises a primary biochemical module and a secondary biochemical module.
Preferably, the primary biochemical module comprises a microbial replenishment system.
Preferably, the secondary biochemical module comprises an MBR and an MABR control system.
Preferably, the dual membrane module comprises a RO, UF dual membrane system.
And the other sewage directly enters the centralized treatment module.
In a preferred embodiment, the centralized processing module comprises a biological module and a double membrane module.
Preferably, the biological module comprises a primary biochemical module and a secondary biochemical module.
Preferably, the primary biochemical module comprises a microbial replenishment system.
Preferably, the secondary biochemical module comprises an MBR and an MABR control system.
Preferably, the dual membrane module comprises a RO, UF dual membrane system.
The second aspect of the invention provides an application of a method for advanced treatment and recycling operation of sewage in petrochemical industry, which is characterized by comprising the following steps: the method is applied to the sewage treatment of oil refineries.
The API is short for American Petroleum institute, which makes corresponding quality specifications for the petroleum, petrochemical and natural gas industries.
The MBR is a Membrane bioreactor (Membrane Bio-Reactor), and is a novel water treatment technology combining a Membrane separation unit and a biological treatment unit.
The MABR is a Membrane Aerated Biofilm Reactor (Membrane Aerated Biofilm Reactor), and is a technology combining a Biofilm process and aeration.
The AO is an anaerobic-aerobic process method and is used for removing organic matters in water.
The RO is a reverse osmosis membrane, the aperture is 0.0001 micron, only water molecules and partial mineral ions can pass through the RO, and other impurities and heavy metals are discharged through a waste water pipe.
The UF is an ultrafiltration membrane, the molecular weight cutoff range is 1000-; can intercept target products, and can separate target products with different molecular weights through micromolecular impurities (inorganic salts, micromolecular pigments, monosaccharides, ashes and the like) and water.
The BPM is a bipolar membrane, and is a compound type ion exchange membrane which is usually compounded by an anion exchange layer and a cation exchange layer.
Compared with the prior art, the invention has the following beneficial effects:
1. the sewage impurity and chemical reagent removal rate treated by the operation method for advanced treatment and reuse of the sewage in the petrochemical industry is high, the standard of reuse water can be achieved, the water quality is stable, and the phenomena of water quality deterioration such as precipitation and stratification can not occur.
2. The operation method for advanced treatment and recycling of sewage in petrochemical industry adopts the modularized treatment device, the device is simple and can be flexibly moved, the scale of each module device can be changed according to actual needs, and the module device not only can be flexibly transported to a production source to treat sewage, but also can be used as a standby treatment device to deal with the impact of abnormal conditions on enterprises when the sewage treatment device is abnormal, so that the economic burden of the enterprises is reduced.
3. According to the invention, the voltage and the bubble diameter in the API oil-water segmentation module are limited, so that the problem of low oil removal efficiency caused by unstable bubble size and movement rate in the prior art is solved, and the service life of a subsequent double-membrane system is further prolonged by adding a specific flocculating agent.
4. The invention solves the problem of low desalination rate of the electrodialysis method in the prior art by selecting the specific anion-cation exchange resin and combining the electrodialysis method, and greatly improves the desalination rate of the desalination module by combining the BPM membrane with specific thickness.
5. The invention limits the temperature of the MBR and MABR control systems, solves the problem that the purification efficiency cannot be further improved due to overlooking of reaction temperature in the prior art, further protects the MBR and MABR membranes and prolongs the service life.
6. By arranging the MBR biochemical system, the invention has the advantages of good water quality, small floor area of equipment, difficult odor generation, strong impact load resistance and difficult sludge clogging.
7. According to the invention, the third air flotation module, the AO biochemical module and the ozone decomposition module are arranged in the desalination module, so that the problems of incomplete desalination effect, poor effluent quality and difficult degradation of organic pollutants in the prior art can be solved.
Detailed Description
The present invention will be specifically described below by way of examples. It should be noted that the following examples are only for illustrating the present invention and should not be construed as limiting the scope of the present invention, and that the insubstantial modifications and adaptations of the present invention by those skilled in the art based on the above disclosure are still within the scope of the present invention.
Polycarbonate CAS number: 9002-84-0
Polytetrafluoroethylene CAS number: 25037-45-0
In addition, the starting materials used are all commercially available, unless otherwise specified.
Examples
The first aspect of this embodiment provides an operation method for advanced treatment and reuse of sewage in petrochemical industry, which is to divide the sewage into oily sewage, sulfur-containing sewage, salt-containing sewage, and other sewage according to different sewage outlet positions.
Oily sewage sequentially enters a microorganism supplementing system, an MBR, an MABR control system, an RO and UF double-membrane system after being treated by an API oil-water segmentation module, a first air flotation module and an MBR biochemical system.
The sulfur-containing sewage is treated by the API oil-water segmentation module and the second air floatation module and then sequentially enters a microorganism supplement system, an MBR (membrane bioreactor), an MABR (moving active biofilm reactor) control system, an RO (reverse osmosis) and an UF (ultrafiltration) double-membrane system.
The salt-containing sewage is treated by a third air floatation module, an AO biochemical module, an ozone decomposition module, an EDI desalination module and a BPM membrane desalination module and then sequentially enters a microorganism supplement system, an MBR (membrane bioreactor), an MABR (moving active biofilm reactor) control system and an RO (reverse osmosis) and UF (ultrafiltration) double-membrane system; a flocculating agent is added into the third air floatation module, and the flocculating agent is prepared from aluminum chloride and ferric chloride according to a mass ratio of 2: 1, compounding.
And other sewage directly enters a microorganism supplement system, an MBR (membrane bioreactor), an MABR (moving active biofilm reactor) control system and an RO (reverse osmosis) and UF (ultrafiltration membrane) double-membrane system in sequence.
The air flotation modules are all used for producing air bubbles by an electrolytic method, the voltage is 7v, and the diameter of each air bubble is 3 +/-1 cm.
The EDI desalination module is prepared from 201X7MB strong base anion exchange resin and 001X7MB strong acid cation exchange resin, and is purchased from Tianjin Kai resin technology Co.
The thickness of the film in the above BPM was 200. mu.m.
The MBR middle membrane is made of polycarbonate and has a pore size of 0.2 μm.
The MBR middle membrane is made of polytetrafluoroethylene, and the aperture is 0.1 mu m.
The temperature of the secondary biochemical module is 50 ℃.
The water permeability of the membrane in the RO is 10GFD, and the molecular interception of the membrane in the UF is 35000 daltons.
15g/L of aluminum sulfate serving as a flocculating agent is added into the air flotation module, the MBR, the MABR control system and the RO and UF double-membrane system and stirred for 120 minutes.
Each module is provided with pH, conductivity, oxygen content, gas and liquid flow detection equipment, and transmits signals to a monitoring system in real time to ensure normal operation of the system.
The second aspect of the embodiment provides an application of the method for advanced treatment and recycling operation of petrochemical industry sewage, and the method is applied to treatment of oil refinery sewage.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may modify or change the technical content of the above disclosure into equivalent embodiments with equivalent changes, but all those simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention still belong to the protection scope of the present invention.

Claims (10)

1. An operation method for advanced treatment and reuse of sewage in petrochemical industry is characterized by comprising the following steps: according to different sewage outlet positions, dividing the sewage into oil-containing sewage, sulfur-containing sewage, salt-containing sewage and other sewage;
the oily sewage enters a centralized treatment module after being treated by an oil removal module;
the sulfur-containing sewage is treated by the oil removal module and then enters the centralized treatment module;
the saline sewage enters a centralized processing module after being processed by a desalting module;
the other sewage directly enters a centralized processing module;
the other sewage comprises factory polluted rainwater, domestic sewage and polluted condensed water.
2. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 1, characterized in that: the oil removal module comprises an API oil-water segmentation module, a first air flotation module and an MBR biochemical system; the air flotation module adopts an electrolysis method to manufacture bubbles, the voltage of the electrolysis method is 6-8v, and the diameter of the bubbles is 0.5-5 cm.
3. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 2, characterized in that: and a flocculating agent is added into the air floatation module.
4. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 1, characterized in that: the desalination module comprises a third air flotation module, an AO biochemical module, an ozone decomposition module, an EDI desalination module and a BPM membrane desalination module, wherein the thickness of the BPM membrane is 150-250 mu m.
5. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 1, characterized in that: the centralized processing module comprises a biological module and a double-membrane module.
6. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 5, wherein the operation method comprises the following steps: the biological module comprises a primary biochemical module and a secondary biochemical module.
7. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 6, wherein the operation method comprises the following steps: the primary biochemical module comprises a microorganism supplement system, and the secondary biochemical module comprises an MBR and an MABR control system.
8. The operation method for advanced treatment and reuse of petrochemical industry sewage according to claim 7, characterized in that: the MBR middle membrane is made of polyester, and the aperture of the membrane is 0.1-0.3 μm; the membrane in the MBR is made of fluorine-containing ethylene copolymer, and the aperture of the membrane is 0.05-0.2 μm; the temperature of the secondary biochemical module is 45-55 ℃.
9. The operation method for advanced treatment and recycling of sewage in petrochemical industry according to claim 5, wherein the operation method comprises the following steps: the double-membrane module comprises an RO and UF double-membrane system; the water permeability of the RO middle membrane is 8-14 GFD; the molecular cut-off of the membrane in UF was 30000 and 38000 daltons.
10. The application of the advanced treatment and recycling operation method for petrochemical industry sewage according to claim 1 is characterized in that: the operation method is applied to the sewage treatment of oil refineries.
CN202110935289.6A 2021-08-16 2021-08-16 Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof Active CN115057576B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110935289.6A CN115057576B (en) 2021-08-16 2021-08-16 Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110935289.6A CN115057576B (en) 2021-08-16 2021-08-16 Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof

Publications (2)

Publication Number Publication Date
CN115057576A true CN115057576A (en) 2022-09-16
CN115057576B CN115057576B (en) 2024-03-26

Family

ID=83197295

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110935289.6A Active CN115057576B (en) 2021-08-16 2021-08-16 Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof

Country Status (1)

Country Link
CN (1) CN115057576B (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101597119A (en) * 2008-06-03 2009-12-09 新疆德蓝科技有限公司 Integrating technology of water supplying and saving and sewage reusing technology system in petroleum and petrochemical industry
CN102452750A (en) * 2010-10-15 2012-05-16 中国石油化工股份有限公司 Method for oil refinery sewage classification control and grading treatment
CN110845070A (en) * 2018-08-21 2020-02-28 中国石油天然气股份有限公司 Sewage treatment system
WO2021009537A1 (en) * 2019-07-14 2021-01-21 Majid Ahmadi Modern process for spent caustic treating and converting wastewater into valuable by products with process simulation by aspen plus

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101597119A (en) * 2008-06-03 2009-12-09 新疆德蓝科技有限公司 Integrating technology of water supplying and saving and sewage reusing technology system in petroleum and petrochemical industry
CN102452750A (en) * 2010-10-15 2012-05-16 中国石油化工股份有限公司 Method for oil refinery sewage classification control and grading treatment
CN110845070A (en) * 2018-08-21 2020-02-28 中国石油天然气股份有限公司 Sewage treatment system
WO2021009537A1 (en) * 2019-07-14 2021-01-21 Majid Ahmadi Modern process for spent caustic treating and converting wastewater into valuable by products with process simulation by aspen plus

Also Published As

Publication number Publication date
CN115057576B (en) 2024-03-26

Similar Documents

Publication Publication Date Title
CN103771650B (en) A kind for the treatment of process of coal gasification waste water
CN103288309A (en) Coal gasification wastewater zero-emission treatment method, treatment system and application thereof
WO2022082955A1 (en) System and method for utilizing air flotation pretreatment + biochemical + double-membrane processes for treating and reusing machining wastewater
CN113003846B (en) Zero-emission treatment process and system for sewage with high salt content and high COD (chemical oxygen demand)
CN107857438B (en) Zero-emission process for wastewater treatment of chemical enterprises and parks
Ranjit et al. Conventional wastewater treatment processes
CN101781048A (en) Low ammonia nitrogen waste water treatment and recycling method
CN107226581B (en) Zinc-containing wastewater treatment method, treatment system and application
CN107200435B (en) Nickel-containing wastewater treatment method, treatment system and application
CN106277597A (en) The processing method of the higher fatty acid waste water of food industry
CN106277614B (en) A kind of processing method of reuse condensed oil sewage
CN111470694A (en) Zero-discharge reclaimed water recycling process and system for pharmaceutical wastewater
CN111196668A (en) Emergency treatment method for benzene-containing strong-acid chemical wastewater
CN113003845B (en) Zero-emission treatment process and system for sewage with high sulfate content and high COD (chemical oxygen demand)
CN115057576B (en) Operation method for advanced treatment and reuse of sewage in petrochemical industry and application thereof
RU141342U1 (en) COMPLEX FOR WASTE WATER TREATMENT FROM OIL PRODUCTS
CN212174737U (en) Integrated treatment system for zero discharge of domestic garbage sewage
CN210796097U (en) Container formula landfill leachate processing system
CN211644970U (en) Spices waste water desalination system based on electrodialysis technique
CN103253836B (en) A kind of percolate deep purifying treatment unit and method
CN210340611U (en) Combined treatment system for complex wastewater of drilling and completion of oil and gas field
CN105859035A (en) Reclaimed water reuse and treatment process
CN111018247A (en) Zero release processing system of chemical industry waste water
CN220376513U (en) High-salt high-concentration wastewater treatment system
CN219709306U (en) Simultaneously is applicable to hot electrogalvanizing cold rolling acid-base wastewater treatment and recycling system

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant